Hi all, In the ...\bin directory both glut32.dll and glut32.lib are provided. Since glut32.dll is used at runtime, this makes sense. glut32.lib is only needed for linking against, but the corresponding header file (GL\glut.h) is not included in the distribution. My request would be to include GL\glut.h so extensions such as ruby-open can be built without needing to find glut.h somewhere. Also, it would be convenient to put glut32.lib in ...\lib (along with msvcrt-rubyXX.lib) so only one directory is needed in the linker search path. Thanks, Ronald